SYSTEM OPERATION
16
NON-DIRECT VENT
VENT/FLUE TERMINATION
NO TERMINATIONS
ABOVE WALKWAY
4'
4'
NON-DIRECT VENT
VENT/FLUE TERMINATION
DIRECT VENT
VENT/FLUE TERMINATION
FORCED AIR
INLET
OTHER THAN
COMBUSTION AIR
TERMINATION INTAKE
GRADE OR HIGHEST
ANTICIPATED
SNOW LEVEL
T
RBBR B T G T RT
T
RBBR B T XTR T T R BT
XTR R T B TK T QT RT
T G G RT K G B
JR R T T XR T G G RB
X
Refer to the following tables for applicable length, elbows, and
single 90° elbow must be secured to the combustion air intake
to prevent inadvertent blockage. The tee or elbows used in
the number of elbows in the piping system.
1 2 3 4 5 6 7 8
2 75 71 67 63 60 56 52 48
3 126 120 115 110 105 99 94 89
2 37 33 30 26 22 18 15 11
3 107 102 96 91 86 81 75 70
2 100 95 90 85 80 75 70 65
3 168 161 154 147 140 133 126 119
2 50 45 40 35 30 25 20 15
3 143 136 129 122 115 108 101 94
2 60 55 50
45 40 35 30 25
3 113 106 99
92 85 78 71 64
2 60 55 50 45 40 35 30 25
3 120 113 106 99 92 85 78 71
2 45 40 35 30 25 20 15 10
3 103 96 89 82 75 68 61 54
2 45 40 35 30 25 20 15 10
3 151 144 137 130 123
116
109 102
*M EC961205DN
3 185 178 171 164 157 150 143 136
2 100 95 90 85 80 75
70 65
3 110 103 96 89 82 75 68 61
2 45 40 35 30 25 20 15 10
3
110 103 96 89 82 75 68 61
2 35 30 25 20 15 10 5 NA
3 103 96 89 82 75 68 61 54
2 45
40 35 30 25 20 15 10
3 110 103 96 89 82 75 68 61
2.5" pipe may be used instead of 2" pipe.
For installations at or above 7,000 altitude use 3" venting (and combustion
*M EC96/*CEC96 Direct Vent (2 - Pipe) and Non-Direct Vent (1- Pipe)
(6)
Maximum Allowable Length of Vent/Flue Pipe
*M EC960302BN
&
*M EC960402BN
*M EC960303AN
&
*M EC960403AN
in the piping system.
4) 2 1/2” or 3” diameter pipe can be used in place of 2” diameter pipe.
equivalent to one 90 deg. elbow.
6) One 90° elbow should be secured to the combustion air intake connection.
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